On Thu, 19 Apr 2007, leon zadorin wrote:
Hi, I am thinking that there may be a bug in libGL in your XFree project...
In xc/lib/GL/glx/glxext.c, AllocAndFetchScreenConfigs:
line 979 locks the display: LockDisplay(dpy); then line 1013 unlocks the display once: UnlockDisplay(dpy); ... but the code which follows line 1013 (e.g. any of the lines: 1016, 1028, 1038, 1083) will result in double unlocking (i.e. unlocking the already unlocked display which on some systems such as NetBSD-current's macppc port raises the "unlocking already unlocked mutex" error and the process is killed).
My suggestion is to take out line 979. The following (albeit from Mesa) file in OpenBSD repository appears to have it solved: http://www.openbsd.org/cgi-bin/cvsweb/xenocara/dist/Mesa/src/glx/x11/glxext.c?rev=1.2&content-type=text/x-cvsweb-markup
Am sorry if I am mistaken in thinking that it is a bug in XFree's libGL, if so, however - can anyone explain why line 979 (and subsequent double unlocking of the display) is actually needed in the first place?
This bug was reported in freedesktop's Bugzilla. See http://bugs.freedesktop.org/show_bug.cgi?id=8521 I have just now committed the fix suggested therein. Thanks for reporting the problem.
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